优化搜索展示过程，离开搜索页暂停搜索线程池，回到搜索页时继续线程池任务

app/src/leanback/java/com/fongmi/android/tv/ui/activity/CollectActivity.java

@@ -125,7 +125,8 @@ public class CollectActivity extends BaseActivity {
         mAdapter.add(Collect.all());
         mPageAdapter.notifyDataSetChanged();
         int core = Runtime.getRuntime().availableProcessors();
-        mExecutor = new PausableThreadPoolExecutor(Math.max(Constant.THREAD_POOL, core), core * 2, 60L, TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>());
+        int corePoolSize = Math.max(Constant.THREAD_POOL, core);
+        mExecutor = new PausableThreadPoolExecutor(corePoolSize, corePoolSize, 0L, TimeUnit.MILLISECONDS, new LinkedBlockingQueue<Runnable>());
         mBinding.result.setText(getString(R.string.collect_result, getKeyword()));
         for (Site site : mSites) mExecutor.execute(() -> search(site));
     }